DS1868S-10+

Digital Potentiometers Overview

The DS1868S-10+ is a dual digital potentiometer IC featuring two independent 256-position resistive elements. It operates on a single +5V supply or ±3V supplies, with a recommended operating voltage of 4.5V to 5.5V. The device utilizes a 3-wire serial interface (RST, CLK, DQ) for setting and reading wiper positions via an internal 17-bit I/O shift register. Standard resistance is 10 kΩ with a tolerance of ±20%. It supports stacked configurations for increased total resistance and cascade operation for multi-device control. The component is housed in a 16-pin SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Dual digitally controlled potentiometers with 256 tap positions each
• 3-wire serial interface for data input and output
• Stacked configuration capability to double end-to-end resistance
• Cascade operation allows daisy-chaining multiple devices

Digital Potentiometers Applications

• Variable gain amplifier circuits
• Fixed gain attenuator applications
• Multi-device control systems requiring daisy-chained digital potentiometers

Digital Potentiometers Procurement Notes

Verify the specific suffix 'S' corresponds to the 16-pin SOIC package variant when sourcing. Confirm that the '10' designation indicates the 10 kΩ resistance value. Ensure the '+'' suffix aligns with lead-free manufacturing requirements if applicable to the project specifications.

Digital Potentiometers Selection Notes

Select this component when dual independent digital control is required within a single package. The 10 kΩ resistance value suits moderate impedance applications. Consider the 3-wire serial interface compatibility with the host microcontroller. Evaluate the need for stacked or cascaded configurations if higher resistance or multi-unit synchronization is necessary.

Digital Potentiometers Part Context

The DS1868 belongs to the DS1868 family of dual digital potentiometers. Variants include different resistance values such as 50 kΩ and 100 kΩ. Package options extend beyond the SOIC to include TSSOP and DIP formats. The series is characterized by its pumpless design and low power consumption.

Digital Potentiometers Replacement Considerations

Direct replacements must match the dual-channel architecture and 3-wire serial interface. Verify pinout compatibility, particularly for the RST, CLK, and DQ signals. Check if alternative packages like TSSOP or DIP are acceptable for the physical layout.